Opaline

Full definition of opaline

Adjective

1. resembling opal in its iridescence

Noun

1. a clear-to-white liquid secreted by sea hares (genus Aplysia) that becomes viscous upon contact with water''The attack on a sea hare by a spiny lobster causes release of the whitish opaline, followed the co-release of both opaline and ink.

Related terms

• opalescent

Noun

1. (mineralogy) any of several minerals resembling opal----